I found Sue Dengate book very helpful in some ways (in relation to additives), however when your child doesn't have the severe allergies her children did then it was way overkill IMO. I think the only fruit you could eat was pears (?) from memory... Now my DD had asthma but she doesn't seem to be affected anymore. She eats all types of fruit & veg... I'd do it broadly to start with then if no improvement look to eliminate more. GL